More shadow tiddlers

These ones are designed as fallback content for empty TiddlyWikis -
these are the tiddlers that end users are expected to modify to
customise their wiki

core/wiki/DefaultTiddlers.tid

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+title: $:/DefaultTiddlers
+
+GettingStarted

core/wiki/GettingStarted.tid

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+title: GettingStarted
+
+Welcome to TiddlyWiki, the non-linear personal web notebook.
+
+To get started, first verify that you can save changes successfully - see http://five.tiddlywiki.com/ for detailed instructions.
+
+Then you can:
+
+* Create new tiddlers using the 'plus' button in the sidebar
+* Save changes using the 'download' button in the sidebar
+* Edit [[DefaultTiddlers|$:/DefaultTiddlers]] to determine which tiddlers appear when you open this wiki
+* Edit the SiteTitle and SiteSubtitle

core/wiki/SiteSubtitle.tid

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+title: SiteSubtitle
+
+a non-linear personal web notebook

core/wiki/SiteTitle.tid

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+title: SiteTitle
+
+My ~TiddlyWiki